Originally posted by sephiroth clock
Note classical is composers in the Bach, Mozart, Beethove, Telemannish area. This does not include the romantics.
Actually this shouldn't include Bach (supposing that you're talking about Johan Sebastian) and Telemann, as they were baroque composers, not classical. Classical era was from 1750 to 1820 or so and its most important composers were propably Joseph Haydn, W.A. Mozart and Ludwig van Beethoven.

But if you're talking about classical music generally, including other music eras than classical, you should include at least baroque, classical and romantic music, even impressionistic.